EnergeticAI
Apps
Open-source AI for Node.js, 67x faster
EnergeticAI shares 2 topics with Code99: Backend Development and Free. Both are free.
We've curated 46 of the best alternatives to Code99, ranked by feature overlap, topic similarity, user ratings, and popularity. EnergeticAI, Vly AI, and Regexer lead the list as the closest matches.
Updated May 18, 2026
The list includes 46 free alternatives, so whether you're looking for a no-cost replacement or a more capable paid tier, there's an option to compare. Code99 itself is free, which makes free alternatives the most natural starting point.
Many of these tools cluster around use cases like Free, Image, Text, and Assistant — the same problem spaces Code99 addresses. Cross-referencing tools that overlap on multiple topics gives a more reliable signal than category alone, because two products in the same category can still serve very different workflows.
Our ranking weighs eight signals: shared category, topic overlap, feature overlap, name and description text similarity (via PostgreSQL's pg_trgm and tsvector), Bayesian-smoothed user ratings, pricing-model match, popularity, and editorial overrides. Scores are then normalized within each tool's own candidate pool so the top match always represents the strongest available alternative.
Use the table of contents below to jump to free or paid alternatives, or scroll down to compare each option side-by-side with Code99.
Ranked by compatibility score
Apps
Open-source AI for Node.js, 67x faster
EnergeticAI shares 2 topics with Code99: Backend Development and Free. Both are free.
Saas Development
Turn prompts into production-ready AI apps
Vly AI shares 2 topics with Code99: Backend Development and Free. Both are free.
46 free and 0 freemium options.
22 additional candidates
EnergeticAI ranks as the highest-scoring alternative to Code99, based on shared category, topic overlap, feature similarity, and user ratings. Ratings are still being collected for this tool.
Yes — 46 fully free and 0 freemium alternatives are available, including EnergeticAI, Vly AI, and Regexer.
EnergeticAI is similarly priced (free) and is classified under Apps. View its detail page to compare features, integrations, and reviews side-by-side.
Top Rest Apis alternatives include EnergeticAI, Vly AI, Regexer, and Spark App. These tools share the same primary category and have meaningful topic overlap with Code99.
Neither Code99 nor EnergeticAI has user ratings yet — be the first to review either tool to help future visitors compare them.
Regex
Regex code validation and generation
Regexer shares 1 topic with Code99: Free. Both are free.
Social Media Posts
AI-powered social media posts from your images.
Spark App shares 1 topic with Code99: Free. Both are free.
Q&a From Books
Explore ideas and discover books through AI-powered conversations.
Talk to Books shares 1 topic with Code99: Free. Both are free.
Nsfw Image Detection
Identify NSFW images in the browser
NSFW JS shares 1 topic with Code99: Free. Both are free.
Music Creation
Produce unique rap lyrics with rap history and tech.
Raplyrics shares 1 topic with Code99: Free. Both are free.
Music Choreographies
Create dance routines from music.
Edge Dance shares 1 topic with Code99: Free. Both are free.
Interior Design
Transform your space with AI-powered interior design ideas
AI Room Planner shares 1 topic with Code99: Free. Both are free.
Coding
Generate code from natural language
CodePal shares 1 topic with Code99: Free. Both are free.
Presentation Slides
Effortless presentations for all.
AI GPT for Slides shares 1 topic with Code99: Free. Both are free.
News
Video news summaries with balanced perspectives.
Nuz shares 1 topic with Code99: Free. Both are free.
Sales Emails
Craft sales emails that connect, engage, and convert.
PictoDream shares 1 topic with Code99: Free. Both are free.
Learning
Instant knowledge on any topic
TutorAI shares 1 topic with Code99: Free. Both are free.
Chatbots
Fast access to online information.
HotBot shares 1 topic with Code99: Free. Both are free.
Children's Stories
Create children's stories with AI-powered imagination.
We Made a Story shares 1 topic with Code99: Free. Both are free.
Social Media Posts
Social post creation made easy from media sources.
AI-Powered Post Generator shares 1 topic with Code99: Free. Both are free.
Therapy
Personalized mental health guidance & coping tactics.
MindMateGPT 2.0: Reflection shares 1 topic with Code99: Free. Both are free.
Apps
Platform for creating & selling workflows.
The Forge shares 1 topic with Code99: Free. Both are free.
Prompts
Improved ChatGPT interactions via prompt generation.
ChatGPT Prompt Generator shares 1 topic with Code99: Free. Both are free.
Stock Market Analysis
Real-time trading analysis for retail investors.
HoopsAI shares 1 topic with Code99: Free. Both are free.
Gift Ideas
Personalized gift recommendations
GiftIdeasAI shares 1 topic with Code99: Free. Both are free.
Movie Recommendations
Movie & TV show recommendations by preferences.
MovieWiser shares 1 topic with Code99: Free. Both are free.
Image Eyes Editing
Fix lazy eye in photos instantly with AI
Lazyeyefix shares 1 topic with Code99: Free. Both are free.
40 more free/freemium alternatives listed below. Browse all Code99 alternatives ↓
46 free or freemium alternatives to Code99 on /tools/code99/alternatives.
Productivity Pet shares 1 topic with Code99: Free. Both are free.
